He said witnesses travelling in a car behind Justice Bampton observed her "veering within that lane".

He said that, after overtaking Justice Bampton, the witnesses kept a close eye on her car because there was a cyclist in the bike lane alongside her.

"They subsequently did not see the cyclist any longer ... the cyclist had been hit, struck, by the car," he said.

He said the cyclist was not knocked from her bike but did sustain a blood nose, and a $10 light on the front of the bike was broken.

"The cyclist became unbalanced and subsequently stopped on the side of the road," he said.

"The accused stopped, apologised and was tested (for blood alcohol) with a positive result."

Stephen Ey, for Justice Bampton, said his client had instructed he make no submissions in mitigation on her behalf.

"She does so in the knowledge and expectation that she will receive a more severe penalty than she would have otherwise," he said.

However, Mr Ey said his client had "suffered much humiliation", was highly embarrassed and remorseful.

Magistrate David Gurry disqualified Justice Bampton from driving for a further eight months and 14 days, and reminded her that meant her licence had been cancelled.

He fined her $1300 for both offences, ordered she pay $260 in court fees and $10 to compensate the cyclist for her broken bike light.

He further ordered she pay SA Police $695.60 for the cost of impounding her vehicle.

Outside court, Justice Bampton declined to comment - Mr Ey told the media "everything has been said" during the hearing.

In a public statement after the hearing, Supreme Court Chief Justice Kourakis said Justice Bampton's duties would be restricted for 12 months.

He said she would not hear matters associated with driving or alcohol offences during that period, and declined to comment further.

Premier Jay Weatherill said he was "deeply disappointed" by Justice Bampton's conduct.

"This is a very disappointing incident and it's appropriate that this judge is penalised just as any other citizen would be penalised," he said.

"Anybody, any citizen, whether they are in the highest office or otherwise, should face the full force of the law if they breach the law, in particular by jeopardising their own and the community's safety through drink driving.

"If he didn't think these arrangements were feasible he wouldn't have put them in place," he said.

Ms Gilcrist disagreed, repeating her calls for Justice Bampton's appointment to be rescinded.

"Justice Bampton cannot dispense justice," she said.

"She has flouted the law, she has broken the law and she cannot administer the law in those circumstances."

Ms Gilcrist said Justice Bampton's penalty reflected the "inadequacy" of drink-driving laws and the need for harsher punishment of offenders.

She said it was concerning that neither Chief Justice Kourakis nor the State Government would take responsibility for Justice Bampton's continued career.

"If (her future) is not up to the Chief Justice, then my question is who is it up to?" she said.

"It seems that it's nobody's job, and that's concerning to me."

She said she would continue writing to Chief Justice Kourakis and the government, seeking answers.

CHIEF JUSTICE KOURAKIS' STATEMENT:

"Justice Bampton was appointed to the office of a Judge of the Supreme Court by the Executive Government on 14 November 2013," the statement reads.

"On appointment to that office Justice Bampton was both entitled and bound in law to discharge the duties of a Judge of this Court.

"The Chief Justice has no authority to suspend the constitutional operation of a judicial appointment.

"It is a condition of the exercise of judicial duties that a Judge takes the Judicial Oath and Oath of Allegiance.

"Accordingly, I administered the Judicial Oath and Oath of Allegiance to Justice Bampton in my chambers on 2 December 2013.

"However, I had already determined that Justice Bampton would not hear matters associated with driving offences until any charges which might be laid were finalised.

"I made a public statement to that effect on 1 December 2013.

"As the Chief Justice my authority with respect to the judicial duties of the other Judges of this Court is limited to fixing rosters and supervising the assignment of matters to them.

"I have again considered the question of the matters which should be allocated to Justice Bampton in the light of the circumstances of the offences of which her Honour has been convicted.

"In my view the reasonable concerns of the public arising out of offending of this kind by a serving judicial officer can be adequately addressed by providing that for a period of 12 months from today, Justice Bampton shall not sit on any matter:

* concerning a driving offence or a civil claim arising out of a driving offence;

* which involves a dispute over the mental element of an offence arising out of a defendant's consumption of alcohol;

* concerning the sentencing of an offender who was materially affected by alcohol."

A NOTE ABOUT RELEVANT ADVERTISING: We collect information about the content (including ads) you use across this site and use it to make both advertising and content more relevant to you on our network and other sites.